Shelf



FIG. 1 is a top, front, left side perspective view of a first embodimentof a shelf showing my new design;

FIG. 2 is a bottom, rear, right side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a left side elevational view thereof;

FIG. 9 is a top, front, left side perspective view of a secondembodiment of a shelf showing my new design, the front, right and leftside elevational views being the same as shown in FIGS. 5, 7 and 8,respectively;

FIG. 10 is a bottom, rear, right side perspective view thereof;

FIG. 11 is a top, front, left side perspective view of the firstembodiment of the shelf showing indeterminate width of the shelf; and,

FIG. 12 is a bottom, rear, right side perspective view thereof.

CLAIM The ornamental design for a shelf, as shown and described.